package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
@Slf4j
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {
    //菜品表
    @Autowired
    private DishService dishService;
    //套餐表
    @Autowired
    private SetmealService setmealService;

    @Override
    public void remove(Long id) {
        //查询菜品表和主表是否有关联数据
        LambdaQueryWrapper<Dish> lqw = new LambdaQueryWrapper<>();
        lqw.eq(Dish::getCategoryId, id);
        int count = dishService.count(lqw);
        //判断count是否为0
        if (count > 0) {
            //设置自定义异常返回信息
            throw new CustomException("当前分类下有菜品，无法删除~");
        }
        //查询套餐表是否有数据
        LambdaQueryWrapper<Setmeal> lqw1 = new LambdaQueryWrapper<>();
        lqw1.eq(Setmeal::getCategoryId, id);
        int count1 = setmealService.count(lqw1);
        if (count1 > 0) {
            //设置自定义异常返回信息
            throw new CustomException("当前分类下有套餐，无法删除~");
        }

        //如果没有关联，调用删除方法
        super.removeById(id);
    }
}
